In one of my previous post I had demonstrated how to, Download Large Files from SharePoint Online. While the file download is working perfectly fine, but, I was constantly getting the following error while trying to load/access it’s properties,

In the above screenshot, I have applied a GroupBy setting on a SharePoint View. I needed the same exact values in my application through JSOM. However, all of the online examples, that I came across, were of retrieving all the ListItems of a SharePoint List. You can either retrieve all the items at once or in batches, but there seems to be no provision of applying grouping or aggregation on the ListItems through code!

Somehow, I wasn’t convinced of this and was vehemently against this idea of pulling all the data on client-side first, thereafter applying grouping and aggregations.

In my previous post, I had explained how to upload large files up to 10 GB to SharePoint Online. This is as per the new revised upload limit. The upload operation, as we know, is actually incomplete without download. I mistakenly, assumed that the previous code for file download will work for the latest larger files as well. But, just like I had to rewrite the upload code to accommodate this new limit, file download also needed a complete makeover. I initially tried the following ways with no success.

It’s very difficult to upload a file of this magnitude in a single HTTP request. If ever, the connection fails, the entire upload would have to be restarted! For a large file, this could easily turn into a nightmare for us.

This post is about directly applying aggregations on a SharePoint List, without specifying any grouping condition. If you want to group SharePoint List data before applying aggregation then, refer to this post, SharePoint Group By.

I must admit that this turned out to be little tricky than what I had imagined. The situation was fairly simple. I had a SharePoint List. I had applied couple of Totals functions, Standard Deviation & Variance, on one of its Number field in two separate custom views. I just wanted to retrieve those values from client side. That’s it! My initial assessment was there must be some function/property that I can easily query from the client. As it seemed initially, there’s no direct way of doing that. Fine, just another day at the office for a SharePoint developer 😉